Home / 687,403.20-1,031,104.80-615,086.40

Finding the Fourth Proportional to 687,403.20, 1,031,104.80 and 615,086.40

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Solution

The fourth proportional to 687,403.20, 1,031,104.80 and 615,086.40 is: 922,629.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,403.20 : 1,031,104.80 = 615,086.40 : x
  2. Step 2: Convert to fraction form
    687,403.20/1,031,104.80 = 615,086.40/x
  3. Step 3: Cross multiply
    687,403.20x = 1,031,104.80 × 615,086.40
  4. Step 4: Simplify right side
    687,403.20x = 634,218,539,454.72
  5. Step 5: Solve for x
    x = 634,218,539,454.72/687,403.20
  6. Step 6: Final answer
    x = 922,629.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.